Hey guys, I got a stockpile of Honda GN4 10W-40 SJ motorcycle oil from a friend. Is this safe to rub in my 88 4Runner which calls for SF grade oil? Anything weird about it being motorcycle oil?
What I will admit is that I have used a lot of 20w50 conventional in my youth. But even though I favoured thicker oils when I was young I never used 20W-50 in the winter.